Cannot add mac address to access point

Hi folks,
I have a Linksys WAP610N Access Point, that is configured to only allow internet access to wireless devices, whose Mac address is filled in the Mac filter. I recently purchased a Compaq Presario CQ60 laptop and tried adding its Mac address to my access point.
I keep getting an error message that the format of my Mac address is incorrect and cannot be added to the access point.
I do not want to remove the Mac address security, so it is very important for me to figure out how to get my access point to accept my Mac address. My Mac address is: 00:1F:16:6C:67:90
Thanks for help.
