I have a 2001 Coleman Santa Fe with a similar problem. The right side of the channel that holds the awning has widened so that the awning pulls out at the right side when pressure is put on it. I solved this problem temporarily by putting a couple of additional screws through the channel and the awning, but I'm afraid that these will pull through the awning at some point, so I'm looking for a more permanent solution. We actually take the awning off when we travel and put it under the roof so it won't fall off.
I can't figure out how the channel is attached to the ABS top. There are no visible screws on the outside, so it may just be bonded to the top with adhesive. If the strip is coming loose I'd suggest using a good silicon rubber or epoxy adhesive between the strip and the top.
