Unable to program acura remote for accord??

Hi,

I bought this acura remote off ebay FCC ID E4
EG8D-443H-A Canada 850 102 1625 A which is an acura remote to use on my 99 accord, as the person said it will work , but though I tried programming it as suggested on http://handaaccessories.com/crv/keylessprog.pdf. It does not work. What might be the reason, I tried programming my honda remote and it worked.

Thanks

es

The same reason a civic remote which looks identical won't work. They are all run on slightly different frequencies.