Moving access points may help.
If you have a laptop, you may also want to try being at the dimmer, and while the progress bar is proceeding, hold the button for the entire duration.
Other option is to move the EZSrve closer to the dimmer (maybe the same room) if you have an ethernet port available.
Please note that we are going to add Insteon version 1 electronic linking in version 1.51, so this process will be considerably easier.
Please also feel free to call us directly to work through this.