While selecting Objects it turns to ###

Hi Guys,

I have an issue with my SAP GUI. It may be related to GUI which I suspect. Issue is...

When I select any object, lets take "Organization Unit" or "Perner" and enter Tab, suddenly that changes to "O#" then "O##" and "O###" or "P#" and so on...

It happens everywhere. Suppose in Personal Detail in the drop down if I select "Mr" or "Mrs" and enter Tab, it turns to "Mr#" or "Mrs#"

Really hectic and I can't proceed further. Sap throws error that "Prohibited Character, already deleted"

I am uploading the screenshot. Please find this and give me a solution for it.

I already tried to uninstall GUI 7.30 and installed GUI 7.20. But no luck.