VP UML CE very slow

I have a problem with VP UML ME 3.2. I have 512Mb RAM, in a Athlon XP 1.8, and my project have 380kb, but is impossible to work because is very, very slow. I think it is becouse the JVM (I´m using J2SE development kit 5.0 Update 2, and J2SE Runtime Environment 5.0 update 2, and Java 2 Runtime Environment 1.4.2_07).
How can I do my VP UML ME 3.2 to be more quickly?

Dear lfscholles,

Can you tell me what OS that you are using? Also can you tell me which JVM that you are using for launching VP-UML? you can retrieve the JVM information in the Info tab of the About dialog.

Best regards,
Rain

Windows XP Home SP2, and Java™2 Runtime Environment, Standart Edition 1.4.2_04-b5 of Sun Microsystems Inc.

Windows XP Home SP2, and Java™2 Runtime Environment, Standart Edition 1.4.2_04-b5 of Sun Microsystems Inc.