Recover Mirror Database from Snapshot Database

I have a mirred database and have snapshot created from the mirroed database. I can do data selecting from the snapshot. But when the pricipal server is down , I can re-active the mirroed database.( I did succesfully upto this). Then I need to restore the database from snapshot and which failing with following error message.
Msg 5123, Level 16, State 1, Line 3 CREATE FILE encountered operating system error 3(error not found) while attempting to open or create the physical file 'E:sql_datadevitst_mirrorlog st_mirror_log.ldf'. Msg 5024, Level 16, State 2, Line 3
No entry found for the primary log file in sysfiles1.
Could not rebuild the log. Msg 5028, Level 16, State 2, Line 3
The system could not activate enough of the database to rebuild the log.
Msg 3013, Level 16, State 1, Line 3 RESTORE DATABASE is terminating abnormally.

No answer even from the MSDN forum. So I think it is better to post this at connect.microsoft.com

Interesting, have you looked at the counters and other warning messages on the log.