Have check engine light on

Have check engine light on. Would not pass smog. Got code for a canister purge control valve. Bought one and change it out. The problem is can't reset engine light. Read all the forums, like turn key on press gas pedal 5 times wait 7 seconds press gas for 10 seconds and your supposed to get a blinking light. My truck does none of that. One blog said to disconnect your battery for two hours, I did and now cant even get it to crank at all. Battery seems charged. Did I screw up the Engine control module in some way? Tried jumper start no help. Does anyone have any suggestions.

thanks
Mike