I have Mat integrated with a Opt61C Rls 25 issue 15. Mat has been working fine for 2 years on the older PC. That PC's Harddrive crashed so I installed it on a new PC. After setting up MAT on the new PC everything works great. I retrieved all and have been using it for digital sets for about a month now. I went to change a 500 set and when it goes to transmit in its blind as a bat typing mode it gets lost. It logs in ok then goes to LD 10 ok. Then it types CHG, 500, 4 0 0 1, up to this point all is ok. Then it Enters past the ECHG field then the DES field, the next prompt is WRLS which auto fills out on this switch with a NO so when the switch is asking for a DN the stupid MAT tries to type NO for the previous field so it just and ends the process. I hope I explained this ok and if anyone knows what to change it would be greatly appreciated. If more info is needed ask away.