Thanks For your Reply,

I Finally got the cause of this problem with the help of your Guidance.

Thank you for your reply...

Can i know the Exact cause of this Error. so, i may aware of this and not repeat the same error in future

This is the Error which i got during attach the .mdf File

Location: IndexDataSet.cpp:12109

Expression: retCode == INSERT_SUCCESSFUL

SPID: 56

Process ID: 4024

Msg 1813, Level 16, State 2, Line 1

Could not open new database...

UnFortunately i have that Deleted that Database..but right now i am having that .mdf and .ldf files. I tried to attached that .mdf files but i got some error says...