Import Error

I get this error in Chrome Browser "Uncaught TypeError: Cannot read property 'file_ImportFileName' of null" after I browse for a .csv or .xls file to import.
Using PHPRunner 5.1 2503
ie produces this error.
Webpage error details
User Agent: Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 6.1; WOW64; Trident/4.0; SLCC2; .NET CLR 2.0.50727; .NET CLR 3.5.30729; .NET CLR 3.0.30729; Media Center PC 6.0; .NET CLR 1.1.4322; Creative AutoUpdate v1.40.01)

Timestamp: Thu, 10 Jun 2010 13:17:13 UTC
Message: Object required

Line: 30

Char: 1

Code: 0

URI: https://mywebsite/some_table_import.php
Help!
Nick