Boori cot question about assembly

I know this is probably not in the right spot so please move if needed.
I've pulled my DD2 cot apart this morning (moving into a different room) which was an effort as she was trying to help but now I cannot get it back together and it's only 45 mins till her nap time.

I cannot get the sliding rail back on. The glide pin which goes into the track will not fit, i had to force it to get it out in the first place. The bottom pin has a wider hole in the track I can slip it into but the top one does not.

Does anyone have a Boori cot (I have the Boori Ranch) and know how on earth I get the top glide pin back in?? I've take this cot apart and put it back together several times before myself and I just cannot remember how to do this part.

These are the only instructions given in the assembly guide. http://help.mothercare.com/resources...i_Ranch_Cotbed