Problem with adding a category to Uploads module

[Akha]

When trying to add a new category in Uploads module I have to define a name, a desicription and a server path in the Uploads directory. I do that but instead of creating a category, the system gives me this error message:

Fatal error: Call to undefined method Uploads::mkdirr() in

After that comes the path for a file action.do_addcategory.php and after that

in line 103

I really do not understand where the problem could be. The line in the file mentioned above does not give any kind of hint of what is method is undefined. Does anybody know why is this happening and what should I do to fix the problem?

By the way, here is all the irrelevant information about the system: My CMS Made Simple version is 1.6.9, the server is using PHP 5.2.17, the database type is MySQL 5.0.87 and the version of Uploads module is 1.11. It is dependent of CGExtensions module of which version 1.19 is installed in my system.

Any help?