Did you remove one or both end caps? If your channel goes through the end cap, that one is ok. Sometimes the polycord is trapped by the end caps. If you remove the end caps be careful. It is spring loaded and will get you if you are not prepared. If you need to remove the end caps let me know and I will go into further detail. It's not bad.
Del and Loretta + Hirem the beagle
07 Tour 40FD and 02 Jeep Liberty
USS Frank E Evans DD754-Lest we forget