Problems with a script - Please help

Hy all... I know this is not a rhino script forum, but I need help...

It is my first time I tried to use a script. I downloaded the RenderNamedViews script from the rhino script wiki site. When I run the downloaded script, It trows an error, after I select the views I want to render:  
Source: Rhino script
Error: Type mismatch in parameter. String required
Line: 13
Char: 3
Code:
I find this particular script very usefull for me, but I dont have the time to learn evrything about rhinoscript to find the error in the script. Again, i didnt change the downloaded script in any way.
 Please help.....

Ty

Urh