It seems that the Configuration Template Path does not have the correct path. It should end with ".ascx". And off course the file that you refer to should be in that exact path. Unfortunately in the screen print I cannot read the entire path.
The class name seems correct, since it shows whether capture, refund, etcetera are supported.
In the first value the ascx file is placed inside the Saman folder. In the second value the ascx file is placed inside a subfolder -called Worldpay- of the folder called Saman. Is that the correct path? Do the files really all exist on the given paths?
If that is checked, the the only thing I can think of is that there is an exception when loading the ascx file for configuration. Obviously there is no exception thrown to the user interface. Did you check the log file for any messages?
Can you give more details on what you did to implement this payment method?