Hi,
Please note that as per SAP Note 147519, SAP GUI for Windows 7.20 was developed
with Visual Studio 2008 which will be de-supported by Microsoft on 09th of April 2013.
Can you please apply latest patch of SAP GUI for Windows 7.40 and
latest patch for BI 7.0 ADDON FOR SAP GUI 7.40 and check whether it helps you.
Also, please refer the following SAP Note:
147519 - Maintenance strategy / deadlines for SAP GUI
Thanks & Regards,
Sapna