Hyperworks solver manager + error760

Hi,

I have installed the hyperworks v12 student edition.
When I use the Hyperworks solver I would like to choose the input file.
I know this is possible through the Hyperworks run manager but it only automatically appears when I select Radioss in the analysis menu.
I cannot select the input file in my directory
The thing is I have an error. When I am in my school I can resolve it by changing /LINE by /SURF in the .rad file.
Here, in the analysis menu, Radioss automatically writes the .rad file and runs it, without any possibility to change it

Do you have any idea?

Thanks