horn button

I tried to build half of this: http://www.jcstudiosinc.com/BlogShowThread?id=412&categoryId=426 I can't get it to work. Sometimes it will blow the horn briefly (like a tenth of a second) and then immediately stops. 6906 button works perfectly though. No idea what's wrong, I put five diodes in...

Guys, just bought a used ZW transformer from my local hobby shop and Lionel Train service center. My pocket book is still hurting:ohwell::ohwell:The owner said he went through the entire Transformer and replaced everything that showed any wear with new stuff. I will admit, it runs my trains...