Errors on restricted pages after upgrading to Power CMS 2

All of my pages worked fine while using Power CMS 1, including the restricted pages on the site. I am now in the process of updating the code from Power CMS 2 to replace the Power CMS 1 code and I now get errors only on the pages that were restricted.

The error I am getting is:
Fatal error: Cannot redeclare wa_authenticateuser() (previously declared in /home7/papninon/public_html/UserReg/WA_SecurityAssist/Helper_PHP.php:10) in /home7/papninon/public_html/CMS2/WA_SecurityAssist/Helper_PHP.php on line 48

Any ideas why this is happening or help to correct this issue. If I delete all of the developer notes, I have some in the left sidebar and the main content area, then when I click on the link to the page, I am asked to log in as I should be. Once I log in I am taken to the page, but because I cannot add the developer notes from Power CMS 2, I am sort of out of luck with this.

Why would changing the developer notes from Power CMS 1 to Power CMS 2 create the above error?

I should also add that if I delete the code for the page restriction, I can then add in the developer notes from Power CMS 2 and the page works and looks right, but now it is not restricted to members. Just thought I would add this in case if may help in finding an answer to the error message.

I would appreciate any and all help/answers here.

Thank you

Larry