BlueTooth imac is not working

[nitairoy]

I brought iMac version 10.10.2. The bluetooth worked fine first time, I mean I could transfer files via bluetooth. But recently I can not receives/sent files from mobile(blackberry), macbook pro version 10.10.1. I checked all the sharing option are ok. When I sent files from MacBook Pro, it shows internal error while in iMac it just sudden shows the dialog box and goes in short time. Could anyone please help me out in this situation.