dodge ram 2003 remote start interesting

I have installed a Viper remote start on my 2003 Dodge Ram.  I used some of the wiring guides I found on this site.  I could not have done it without all of you.  It works starts fine, but I have noticed something interesting that has me a little worried.  When I remote start the truck, I notice a strange noise coming from under the truck, almost sounds like underneath the drivers side door.  As soon as I put the key in the ignition and step on the break it stops.  I am worried I don't have some important vehicle system properly powered.  Does anybody have any ideas or seen something like this?  Thanks in advance.

No, the starter is definetly turning off after the motor starts. 

I have always thought the problem might be some accessory wire not being powered.  Do you have color code list of the accessory wires that should be powered??? 

Thanks

Yuo did not power up all the ACC or the IGN wires required . I had the same thing happen and I neglected to power up the 2nd PRIMARY ACC wire ( GREEN ). In this truck you need to power up 2 x IGN and 2 x ACC and one 2nd ACC.