Freeze at "Locking Drive for Exclusive Access"

[computerlove]

Since a few days before, the imgburn will freeze at "locking drive for exclusive access" when I tried to buy disc.  I therefore terminated the application using Program Manager each time.  The log file is reproduced below -

 

I 09:41:56 ImgBurn Version 2.5.7.0 started!

I 09:41:56 Microsoft Windows 7 Professional x64 Edition (6.1, Build 7601 : Service Pack 1)

I 09:41:56 Total Physical Memory: 8,354,960 KB  -  Available: 5,476,960 KB

I 09:41:56 Initialising SPTI...

I 09:41:56 Searching for SCSI / ATAPI devices...

I 09:41:56 -> Drive 1 - Info: HL-DT-ST BD-RE  BH12LS38 1.00-D2 (F:) (ATAPI)

I 09:41:56 Found 1 BD-RE!

I 09:42:56 Close Request Acknowledged

I 09:42:56 Closing Down...

I 09:42:56 Shutting down SPTI...

I 09:42:56 ImgBurn closed!

 

Can anyone help me to fix the problem?  Thanks!