SQL pane error

Hi, I have just installed Postgresql 9.0 and pgadmin 1.12 on Windows xp with Service Pack 3. I chose spanish as the language for pgadmin. The problem appears when a try to ejecute SQL pane. The pgadmin Freeze and CPU usage is 100% until the program is closed. I ve installed pgadmin 1.12 and postgresql9.0 on another computer but Windows 7 and this problem doesnot appear.  I cannot migrate to postgresql 9.0 without pgadmin working ok. Its possible that this problem appears because I have pgadmin 1.10 and 1.12 in the same pc? Some sugestions. Thanks in advance.

Dr. Diego Garcilazo from Argentina.