How do i make my Trillian chat window stay larger

[PC Freak]

when i open a chat window the txt box and chat box are too small for my taste. I expand the window and resize the boxes and it looks good. When i close the chat box and open a new one it's back to the small size.
How can i make it the default size larger.

Thanks

 

[troytime]

odd, my version remembers the size for each group of contacts