Try this, see if there is another process using the default local address. I do not know if the 127.0.02 address is used by your system you may need to change it to something else.
#!/bin/bash
CMDS="--arq-server-address 127.0.0.2 --XMLRPC-server-address 127.0.0.2"
FLDIGI $CMDS &
sleep 4
FLAMP $CMDS &