How do you open the curtains on Ben 10 protecter of the earth when defeating Ghost Freak psp when ever i jump to open it it doesn't open please help?

In "Ben 10: Protector of Earth" for PSP, to open the curtains when facing Ghost Freak, you need to use the right character. Switch to Upgrade, as his ability allows you to manipulate the environment. When you get close to the curtains, press the action button to interact with them, which should allow you to open them. If you're still having trouble, make sure you're positioned correctly and try again.