Runtime would not disable the buttons / scripts. I would test with a different login name. Admin with no password is the default login unless you changed it.
It sound like your security setting have disabled scripts.
I have include a link to the secuity guide. Verify all setting on page 7 with your own settings. (That you have access to scripts)
Tells us more about the scripts performed by the Perform Script step. That step should work the same in run time solutions as it does in normal FileMaker files.