This computer has not reported staus in xx days or more days - Windows 8.1 in WSUS 3.2.7600.226

Hi

We have WSUS with 3.2.7600.226 installed on Windows 2008 R2

We have recently deployed Windows 8.1 x64 pcs , Now in WSUS console Windows 8.1 ALL computers status shows " This computer has not reported staus in xx days or more days " , However the updates are Pushed and installed correctly on Windows 8.1.

Computers with Windows 7 shows correctly in WSUS , problem is to only Windows 8.1.

KBs KB2720211 and KB2734608 on WSUS are already installed.

 Thanks