PHP und WAP?

Hello,
I've made a WML site and one site of it is PHP. And just this site works only on WAP Browsers in the Internet but not on a mobilphone.

I specified on the beginning of the script that the further comming part is WML - code in the header of my PHP script. But it's still not working. Hier the code: http://wap.ebeneblau.com/get.wml.phps

But I think that it is not a script error, I think it is a error of my server. If anyone has an idea, where the error comes from, I would be glad to hear from you. Johnny B. (Germany)