PLSQL developer 8, oracle client 32 bit 10g and windows 7

Problem:

Even I use the 32 bit oracle client 10g on my windows 7 machine, I still can't use PLSQL developer 8 correctly. Every time I try to log in, it pops up an empty window with no error message.

Solution:

Right solution is found here:
http://stackoverflow.com/questions/3895354/allround-automations-pl-sql-developer-on-windows-7-tns-over-ip-connect-to-remo

RUN IT AS ADMINISTRATOR!!!!