Without being able to see/hear it, anything is just a guess....but, it does sound like and out of adjustment situation. The "give and take" type setup that these use requires that there be a bit of slack in the 4 opposite cables of the ones doing the work. Have you downloaded the manual and read through it?
There is a link in this section that will lead you to the manual if you haven't already found it......
Here is a link for the Accu-Slide website.....
http://norcoind.com/bal/products/oem...de/index.shtml. Scroll down the page and you will see a place to click on and download the manual I'm talking about.