Firstly sorry to note. We have tried our best to make this process as easy as possible. The most common reasons are the following:

#The white markings on the corner posts are not facing upwards and inwards. For this reason the holes will not match up.

#The left or right corner posts are in the wrong location, re-check again.

If, after checking the following you still have issues pleasse follow this link for helpful videos:

If you are still having issues we are hear to help, please email us, include pictures and your delivery address. We will see what is wrong and assist. Email us