Problem with line 805

Hi,

I am experiencing a problem with line 805 in user_import.module
while ($data = fgetcsv($handle, $user_import_line_max, ',')) {

I can't confirm whether this is a problem with my install or not but I have setup the module according to the readme file and run into this problem with the sample.csv and my own csv files.

URL: http://oratostage.randomlink.com/index.php?q=admin/settings/user_import/add

ERROR MESSAGE:
warning: fgetcsv(): supplied argument is not a valid stream resource in D:\wwwroot\oratostage.randomlink.com\modules\user_import\user_import.module on line 805.
warning: fclose(): supplied argument is not a valid stream resource in D:\wwwroot\oratostage.randomlink.com\modules\user_import\user_import.module on line 896.
warning: Cannot modify header information - headers already sent by (output started at D:\wwwroot\oratostage.randomlink.com\includes\common.inc:384) in D:\wwwroot\oratostage.randomlink.com\includes\common.inc on line 192.

I also get an error when I try and modify the configuration:
When I try and edit the max users or length of line I get this message:

"Value must be a number. Default has been set.
Value must be a number. Default has been set.
Home » administer » settings
Maximum Users/Process:

Maximum number of users to import each time the file is processed, useful for controling the rate at which emails are sent out.
Maximum length of line:

The default is set at 1,000 characters, if a line in your csv is longer than this you should set a higher maximum here. Setting higher maximums will slow down imports.
Default Settings:
-- none --test
Select if you want to use a previously saved set of settings as default for all imports.
"

I have allowed authenticated users permissions to import users for testing so you can sign up and log in to test or email me and I can send you a login.

thanks for any help on this,
Loc