ibm mobilefirst - dojox.mobile.SimpleDialog is not modal -

i have following structure of worklight application page:

<body>     <div heading/>     <div view/>     <div tab bar/>     <div simple dialog/> </body>

when build app ipad , test on have following problem. dialog window puts gray unclickable layer on except tab bar.

why tab bar stays available?

is bug or i'm doing wrong?

have tried put heading, tab bar , dialog in view?

Breidenthal