ANT Skips test in middle of execution

[attachment=1:305jtzoh]ant_issue.JPG[/attachment:305jtzoh]
Hello,

I have developed a hybrid framework with testng it has one suite and 2 tests, it runs fine with testng.xml and pom.xml,
but when i try to run it from build.xml it skips to next iteration after executing first keyword(in this case openBrowser) and jumps to next iteration, please refer to attached screenshot .

short description of issue:
after executing keyword "openBrowser" it should jump to next keyword "navigate" but instead it fails that test iteration and jumps to next iteration.

It Just launches the browser and skips the test, please help.

also refer to eclipse screenshot.

[attachment=0:305jtzoh]testng.JPG[/attachment:305jtzoh]