Incoming & Sent SMS content decode in sent_sms table in sqlbox

Dear All,
Im using sqlbox for sending and receiving GSM and Unicode sms. In both cases msgdata stored in below format in sent_sms table in mysql database.

%0D%BB%0D%C3%0D%D2%0D%9A

I think above is UCS-2BE/ UTF-16BE encoded. Please assist me as to how I can get the original message by decoding this, preferably using a mysql function or a c# method.

Tried setting alt-charset to ucs-2/ utf-8 in smsc config and enabling mo-record. Non of them gave me the solution.

Appreciate your assistance in advance.

Thanks
Rasika Udayanga.