Combox problem

[nunocabete]

Hello .
I am trying to make a combox but until now without sucess.

Apperar a error and dotn know why.

Some can help me.

Tanks

Please Login or Register  to view this content.

The error its (Invalid user property)

[Kamboj]

use

Please Login or Register  to view this content.

[nunocabete]

the error disappear but, i select one of the options but they dont became selected, became blank the combox.

[Kamboj]

file enclosed.

[nunocabete]

now its ok.
After change the

Please Login or Register  to view this content.