Bitcoind under Windows 7; RPC port 8882 not opening Using Win7 64 bit I'm trying to get bitcoind (v0.8.5) to work.

Bitcoin.conf has the following content (in the %appdata%\bitcoin dir):
rpcuser=12345
rpcpassword=12345

I run using command line: bitcoind -rpcpassword=12345 

I then use the NIRSOFT app cports-x64 which shows list of open TCP/IP and UDP ports on computer. Bitcoind is in the list but only with port 8883. 

Why is the RPC connection not working such that port 8882 (default RPC port) is open and mapped to 127.0.0.1?
You need to be running bitcoind with the -server option set as well as -rpcuser and -rpcpass. These can alternatively be set as lines in your bitcoin.conf. The RPC port will only be open on 8332 if all three of these options are correctly set.