Lockscreen Theme Problem with GalaxyS2

[mahutch]

Have a Galaxy S2. Recently upgraded to ICS. Just downloaded Go Launcher and Go Locker. Was playing around with Launcher themes and successfully changed it. Then was playing around with Go Locker and changed the Locker theme to one different from Go Launcher. Now I can't change Go Locker back to the Go Launcher theme. It doesn't matter what Launcher theme I use. Am pulling my hair out! Help please!