I am sure you all had this error once!

But what can i do to solver the problem,

Everything was ok for the past 2 month,
this morning i change the dbase location to put
a temporary one(to test it fully loaded)
everything was ok, no error,BUT
when i rename the tester one and put back
the old one, i started to get this error!!!

The thing is , it work for the first time you open it,
but the second it gives this error,if i
wait about a minutes and refresh,it's fine!


WHAT IS THE PROBLEM,