Libraries are not adding into Android Private Libraries folder in Android

Libraries are not adding into Android Private Libraries folder in Android

Have multiple libraries in project . The issue is suddenly my libraries
are not adding to "Android private libraries" folder which is essential
for using libraries . Please help me out with the issue. Issue is taking
place with only single project in workspace , other are working cool. Pls
note: In java build path ---> order and export ---> have checked private
libraries . SO this cant be issue for this problem .
My present SDK tools configuration
Console message on cleaning:
[2013-08-24 18:03:33 - Twitter4jSample] Unable to resolve target 'android-7'
[2013-08-24 18:03:34 - myproject] Found 2 versions of
android-support-v4.jar in the dependency list,
[2013-08-24 18:03:34 - myproject] but not all the versions are identical
(check is based on SHA-1 only at this time).
[2013-08-24 18:03:34 - myproject] All versions of the libraries must be
the same at this time.
[2013-08-24 18:03:34 - myproject] Versions found are:
[2013-08-24 18:03:34 - myproject] Path: D:\Project BackUps\project2
gen\dev\facebookSDK\libs\android-support-v4.jar
[2013-08-24 18:03:34 - myproject] Length: 484258
[2013-08-24 18:03:34 - myproject] SHA-1:
bd6479f5dd592790607e0504e66e0f31c2b4d308
[2013-08-24 18:03:34 - myproject] Path: D:\Project BackUps\project2
gen\dev\projectAPP\libs\android-support-v4.jar
[2013-08-24 18:03:34 - myproject] Length: 556198
[2013-08-24 18:03:34 - myproject] SHA-1:
4a6be13368bb64c5a0b0460632d228a1a915f58f
[2013-08-24 18:03:34 - myproject] Jar mismatch! Fix your dependencies
[2013-08-24 18:03:34 - myproject] Found 2 versions of
android-support-v4.jar in the dependency list,
[2013-08-24 18:03:34 - myproject] but not all the versions are identical
(check is based on SHA-1 only at this time).
[2013-08-24 18:03:34 - myproject] All versions of the libraries must be
the same at this time.
[2013-08-24 18:03:34 - myproject] Versions found are:
[2013-08-24 18:03:34 - myproject] Path: D:\Project BackUps\project2
gen\dev\facebookSDK\libs\android-support-v4.jar
[2013-08-24 18:03:34 - myproject] Length: 484258
[2013-08-24 18:03:34 - myproject] SHA-1:
bd6479f5dd592790607e0504e66e0f31c2b4d308
[2013-08-24 18:03:34 - myproject] Path: D:\Project BackUps\project2
gen\dev\projectAPP\libs\android-support-v4.jar
[2013-08-24 18:03:34 - myproject] Length: 556198
[2013-08-24 18:03:34 - myproject] SHA-1:
4a6be13368bb64c5a0b0460632d228a1a915f58f
[2013-08-24 18:03:34 - myproject] Jar mismatch! Fix your dependencies
[2013-08-24 18:03:49 - myproject] Found 2 versions of
android-support-v4.jar in the dependency list,
[2013-08-24 18:03:49 - myproject] but not all the versions are identical
(check is based on SHA-1 only at this time).
[2013-08-24 18:03:49 - myproject] All versions of the libraries must be
the same at this time.
[2013-08-24 18:03:49 - myproject] Versions found are:
[2013-08-24 18:03:49 - myproject] Path: D:\Project BackUps\project2
gen\dev\facebookSDK\libs\android-support-v4.jar
[2013-08-24 18:03:49 - myproject] Length: 484258
[2013-08-24 18:03:49 - myproject] SHA-1:
bd6479f5dd592790607e0504e66e0f31c2b4d308
[2013-08-24 18:03:49 - myproject] Path: D:\Project BackUps\project2
gen\dev\projectAPP\libs\android-support-v4.jar
[2013-08-24 18:03:49 - myproject] Length: 556198
[2013-08-24 18:03:49 - myproject] SHA-1:
4a6be13368bb64c5a0b0460632d228a1a915f58f
[2013-08-24 18:03:49 - myproject] Jar mismatch! Fix your dependencies
[2013-08-24 18:04:07 - myproject] Found 2 versions of
android-support-v4.jar in the dependency list,
[2013-08-24 18:04:07 - myproject] but not all the versions are identical
(check is based on SHA-1 only at this time).
[2013-08-24 18:04:07 - myproject] All versions of the libraries must be
the same at this time.
[2013-08-24 18:04:07 - myproject] Versions found are:
[2013-08-24 18:04:07 - myproject] Path: D:\Project BackUps\project2
gen\dev\facebookSDK\libs\android-support-v4.jar
[2013-08-24 18:04:07 - myproject] Length: 484258
[2013-08-24 18:04:07 - myproject] SHA-1:
bd6479f5dd592790607e0504e66e0f31c2b4d308
[2013-08-24 18:04:07 - myproject] Path: D:\Project BackUps\project2
gen\dev\projectAPP\libs\android-support-v4.jar
[2013-08-24 18:04:07 - myproject] Length: 556198
[2013-08-24 18:04:07 - myproject] SHA-1:
4a6be13368bb64c5a0b0460632d228a1a915f58f
[2013-08-24 18:04:07 - myproject] Jar mismatch! Fix your dependencies
[2013-08-24 18:04:17 - myproject] Found 2 versions of
android-support-v4.jar in the dependency list,
[2013-08-24 18:04:17 - myproject] but not all the versions are identical
(check is based on SHA-1 only at this time).
[2013-08-24 18:04:17 - myproject] All versions of the libraries must be
the same at this time.
[2013-08-24 18:04:17 - myproject] Versions found are:
[2013-08-24 18:04:17 - myproject] Path: D:\Project BackUps\project2
gen\dev\facebookSDK\libs\android-support-v4.jar
[2013-08-24 18:04:17 - myproject] Length: 484258
[2013-08-24 18:04:17 - myproject] SHA-1:
bd6479f5dd592790607e0504e66e0f31c2b4d308
[2013-08-24 18:04:17 - myproject] Path: D:\Project BackUps\project2
gen\dev\projectAPP\libs\android-support-v4.jar
[2013-08-24 18:04:17 - myproject] Length: 556198
[2013-08-24 18:04:17 - myproject] SHA-1:
4a6be13368bb64c5a0b0460632d228a1a915f58f
[2013-08-24 18:04:17 - myproject] Jar mismatch! Fix your dependencies