Change form width dataAssist page

Where in the code do I change the width of a form on an update.php page, created by the DataAssist pages

There may be a couple of places to make the update in the generated .css file. If you give me a url to look at and let me know what width you want I can be more specific.

I can't give you a url because it's on my intranet. The attachment is what i believe is the css file, but I've changed every width in it to 950px and it didn't do anything. However, in the po_update.php, if I change the Form Class="PainlessBasic_PainlessBasic" to Form Class="PainlessBasic_PainlessBasic1" it breaks the css. I attached the po_update.php twice so you can see on line 277 what Form class I changed.

You would have to change lines 208, 288, 295, 302

I've tried that in fd_painlessbasic_painlessbasic.css, and for some reason, it does nothing. Like I said, I've changed every width in that file to 950px and it doesn't do anything.
This is the link to the file: <link href="http://Neptune:8080/webassist/forms/fd_painlessbasic_painlessbasic.css" rel="stylesheet" type="text/css"> and if I change it to: <link href="http://Neptune:8080/webassist/forms/fd_painlessbasic_painlessbasic1.css" rel="stylesheet" type="text/css"> it breaks the page, but if I go to the actual file and change the name of the file, it doesn't affect it. Really strange.

I opened fd_painlessbasic_painlessbasic.css in Dreamweaver and saved it as fd_painlessbasic_painlessbasicNew.css and changed the name in the css reference to <link href="http://Neptune:8080/webassist/forms/fd_painlessbasic_painlessbasicNew.css" rel="stylesheet" type="text/css"> and that worked.

Thanks for the help