I got into my 2003 wagon the other day and my security light was blinking. When I attempted to disable valet mode(by holding unlock with the door open)it did not work. I was using the new style tear drop shape remote. After getting my spare set of keys with the old remote(blue & orange buttons)I was able to disable it like normal. I found that the trunk release button on the new style remotes activates and disables valet mode with a single press. I'm sure that it does on all 02-07 wrx' s also. I just wanted to share this in case someone was having a similar problem.