I have 2 E-Z track turnouts that are giving me a problem.One is a left turnout and the other a right. When the locomotives are operating to go straight as opposed to entering the turnout, they derail on the front trucks. This happens every time. I have Atlas & Athearn diesels. When the engines go the other way they go through the switch fine. Any suggestions? I have spent hours and can't seem to find the cause.At first I thought the air hoses were interfering,but this does not appear to be the case.Thanks.