I purchased MTH's wifi interface unit in early February of this year. I am new to the hobby and up until this weekend I was just running one large oval track on a 8x12 table top. I am using a z1000 brick to power the track through the fixed voltage input 1 of the TIU unit. I would run my two trains I have on the oval track using the MTH app on my iPhone linked to the MTH wifi interface without any issues. I just recently added a second oval of track and am supplying it with power through the fixed voltage input 2 of the TIU. I am using a second z1000 to power this oval. Upon setting up the power to the second oval of track I went in to the MTH app on my phone to run my trains. Anytime I enter the app I always hit the refresh button in the top left corner. This time when I did it gave me a "read time out error". No matter what I tried it would not correct the "read time out error". Also the trains that I have been running through theMTH app were no longer in the active list and I was unable to get them out of the inactive list no matter what I tried. If I unplugged the z1000 going to fixed input 2 I could run the trains on the original oval through fixed input 1 using the MTH app, but as soon as I plugged fixed input 2 back in the same problem occurred. I eventually gave up with the app and was able to get all my trains running on the two ovals using the DCS remote with my TIU. I purchased 2 new trains this weekend (GG1 Pa and a Climax logging set). Along with my originals , all 4 trains were running fine on both ovals using the DCS remote. Can any one help me with this issue. Thanks in advance. I used the exact same transformer set up for the DCS remote as I did when I was trying to use the app on my phone.