Memory Error on GetProperties Action

[Roboblue]

I am trying to setmask on a listbox. When I do a ListBox.GetProperties then preview the project, I get an Application Error (memory cannot be read).
The same happens when I try Input.GetProperties.
Anyone else getting this error?
update: Any GetProperties Action causes this error

[Roboblue]

Can someone please try this and maybe see if I am screwing up?
If I go to Page Preload, un-remark line 11 ---tList = ListBox.GetProperties("ListBox1"); then preview, I get the error
I have tried web object, and input object with same results.
Thanx

[Roboblue]

I re created this project from scratch and now it's OK.
Wierd.