Voice Memos not working properly iPhone

This Apps been behaving strange...
That bar where we supposed to drag foward and rewind in the recorded memo isnt working anymore. So when I want to rewind I cant, I need to stop, and start all over again from the beginning.
And now, It just doesnt record anything!
It shows that it is recording but when I stop to listen, nothing hasnt recorded.
I restarted the phone but it didnt change anything
Does anyone experienced this same problems?
iPhone MC605J Windows Vista Fujitsu FMV-Biblo MG/C70-Intel Duo Core 2 2.26Ghz 2.00 Gb RAM