Ok..., for *three* days I've been trying to get Vista, WinAVR, AVR Studio, and an STK500 to cooperate. I'm a total noob, but about to throw in the towel. Assembly via Studio works fine. Trying to get a dumb serial routine to work via Winavr is going nowhere.Code is attached. Compiles with no errors, runs in Debug simulator fine..., I can watch PORTD bit 1 (UART Tx) changing at the proper rate. Sending a non-stop string of 'U's toggles the output nicely. BUT.., when downloaded to the STK500/8515...,no output. The PORTD outs are OK.., as I can download a blinky program that works fine, the Max 232 circuit is fine and jumpered to PD0/PD1...., there's just nothing being produced by the chip. What am I missing?