Couldn't load queue

Hi to all,
I have successfully configured rt-3.6.1 long time back and it was running fine. For some unexpected reason, i have to reinstall RT. Every thing is working fine, but whenever i want to do any operation on queue, it gives me an error like
Couldn’t load queue
Couldn’t load object 3
Couldn’t load queue 3

And there is nothing in rt.log. But in apache error_log it is giving

WebRT: Couldn’t load queue () (/opt/rt3/share/html/Elements/Error:76)
WebRT: Couldn’t load object 3 (/opt/rt3/share/html/Elements/Error:76)
WebRT: Couldn’t load queue3 () (/opt/rt3/share/html/Elements/Error:76)

I have installed dev-db/mysql-4.1.21.

Please help me, i will be very thankful to you all for the same.

Thanks and Regards

Bijayant Kumar
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