I have been using RMS 2.0 for years and i just encountered this problem when HQ Client was trying to synch with HQ Server.
Message Contained an invalid Store ID / Connection Password Message was not accepted.
This is happening during Worksheet 401. We have changed nothing in either HQ or POS config. We have never had password for HQ Client connection. We checked Store ID and is correct. Tried a few different password in HQ Client/HQ manager but that did not change anything.
What I noticed in HQ Server window is that Store ID keeps changing from "101"- correct to "0" a few times during the same connection. Why is that and how do i fix it?