Flash Builder 4.5 for PHP vs Flash Builder 4.6

Hello,

I don't understand the diference,

I tried 4.6 firts and I did an example with PHP and MYSQL connection and it works on desktop but not in my iphone when it is was compiled,

so that I look for Flash Builder 4.5 for PHP to fix the problem but it looks much more dificult.

So,

Wich is the best choise  if I want to develop apps working with php pages located on my server?

Thanks,

Best regards,

Cristian