Utahn's for Immigration Reform and Enforcement

"I think he ought to consider his views and decide whether they're consistent with the Republican Party," Rep. Chris Cannon, R-Utah, said of the Colorado congressman" (Tancredo)

The above quote comes from ufire.net which is dedicated to immigration reform. What does Cannon think Tancredo is doing that is out of line? It seems to me that the GOP Platform is all for enforcing legal immigration? What am I missing?

Republican Platform