Hi, please read how to report bug
In the current state, your report is incomplete and there's not much that can be done about it.
Please make sure to complete your report, state precisely the issue, the steps you took to reproduce it, eventually propose a capx with the issue.
What version of iPhone are you using ? Does the touch not happen during a preview ? With an exported project ? What type of exported project (HTML5, appmobi, etc...) ?