DSO not activating (Freezed at the step "Reading Metadata")....?

Hi Experts,

I had created a Standard DSO in my QA system & I had taken only one key field (0COMP_CODE) & one Data Field (0AMOUNT)...

After clicking "Activate" this process is running fro a long time i waited for 12 hours but it didn't throwed any error it has stucked up at "Reading Metadata"...............

I checked the same for Non-sap delivered objects also but same error repeating...........

View the screen shoot below for reference ...............

Kindly  Help me if anyone aware of this error............

Thanks & Regards,

Aravind