Unable to import the Test Cases in 1.8 Beta2

[Ram]

I am trying to import Test cases using an simple xls file, which shows me that it is unable to import.

The error message shown after importing is :
"The filename C:\xampp\htdocs\xampp\TestLink\gui\templates_c\a1eecae8988e92945499823d54942cd6-importtcs.xls is not readable"

Do, I need to modify anywhere else. Appreciate a quick response

Thanks & Regards,
Ram

[Ram]

Issue Solved. Reason for the error message is, presently it supports only xls. But by default, the files are now stored with .xlsx extension.

So, saving the file with .xls has helped solve the problem