[pritam]

I think the problem could be in correctly setting up OTM, specially when you are trying to set-up 2 OTM app server instances on a single physical box. We had similar situation and lot of problems with that. Fortunately we soon figured out that you need to specify uniq domain names for each OTM instance (As this is used to generate weblogic domain name during installation). Here is what you should do -
Create virtual ip address for 2 app servers, map different DNS names to these ip address. e.g. otm-app1 == xx.yy.zz.aaa and otm-app2 == xx.yy.zz.bbb
This is very essential to ensure scalability works fine especially if both your instances are on same physical box.

Thanks,
- Pritam.