I am little bit confused with Google back link...... why back links gone after sometimes like i am getting back link from do follow forum and when i checked ....after some time same link gone and comes after sometime same link .......

is this Google Game ?

probably when google bot came to that forum, it was down, so the link was unavailable.
and after next visit everything turned back

Because google bot don,t cache those link so it happen.

Be a part of the DaniWeb community

We're a friendly, industry-focused community of 1.19 million developers, IT pros, digital marketers, and technology enthusiasts learning and sharing knowledge.