Hi,
Please note that SAP GUI 720 is out of maintenance as of 09th of April 2013 as per the following SAP Note:
147519 - Maintenance strategy / deadlines for SAP GUI
Can you please apply latest patch of SAP GUI for Windows 7.30 and
latest patch for BI 7.0 ADDON FOR SAP GUI 7.30 and check whether it helps you.
Also, please refer the following SAP Note:
147519 - Maintenance strategy / deadlines for SAP GUI
Thanks & Regards,
Sapna