CA-42 serial comm bugging out

I've been using a CA-42 (Nokia official) as an interface for a while now but it stopped working recently. The loopback test shows everything OK, but it won't program either of the two units I tested it on.

         Using Port                    : \\.\COM38
         Using Programmer              : arduino
         Overriding Baud Rate          : 115200
avrdude: Send: 0 [30]   [20] 
avrdude: Send: 0 [30]   [20] 
avrdude: Send: 0 [30]   [20] 
avrdude: Recv: 0 [30] 
avrdude: stk500_getsync(): not in sync: resp=0x30

avrdude done.  Thank you.

There's definitely communication happening--it doesn't have wait for a response before getting the ACSII 0 in return. I tested for a short, but that's not it either.

Here's how I have it hooked up if it helps:
RED --> 5V
BLU --> 1k resistor --> D1
WHITE --> 1k resistor --> D0

BUMP, does anybody know what's going on?