Network driver cannot bind a name to the port

Installing informix 7.2.3.TC14 and triying to start it I encountered following problem: 'Internal subsuystem failure: MT attempting to bring listener tread down' In online.log I have found err= -25572, what means Network driver cannot bind a name to the port. A system call has failed. The sqlexecd daemon or INFORMIX-OnLine Dynamic Server cannot access the network port that is specified by the servicename in the sqlhosts file for the database server. This situation might occur because the network port is already in use by another sqlexecd, database server, or other application. Use a different servicename on the command line (prior to Version 6.0) or in the sqlhosts file (beginning with Version 6.0) I tried to find this sqlhosts file but could not. (I didn't think it was etc\\service file, anyway I tried to change informix ports for something different, but didn't succeed) Please help. Many thanks in advance Joel I run NT4+sp4