I've been working with my Mini this evening, and have successfully been able to deploy solutions from VS2010 Express many times.
However, at some point the Mini stopped responding to the deployment from VS2010. I'm moving the Mini between my PCB and the breadboard for programming, and even if VS2010 couldn't program it it still worked on the PCB.
I've tried erasing the board, and can successfully do all the SAM-BA tasks described in the Wiki. I'm using firmware 4.1, and SAM-BA seems to be OK when I write the TinyBooterDecompressor.bin.
However, I cannot get any sort of connection through MFDeploy. I've tried both the 4.1, 4.2 and the old custom one I found on the forum, but none of them are able to get the device capabilities. It just responds "Error: No response from device".
I've used a USB->RS232 cable when using SAM-BA. The cable plugs into a DB9 breakoutboard, and from there I've connected RXD->TX, TXD->RX and GND->GND. It shows up as COM8, but there is no reply on that port in MFDeploy.
I've also got a USB->TTL cable which I'm using for programming the Mini. It uses COM3.
What can I do?