OS not found issue in VMware using WDS on ser2008

i am using VMWare workstation 11, installed windows server 2008 R2 64 bits.
Active directory and DHCP, DNS, and windows deployment services were installed and configured( both boot.wim AND windows-image-file.wim of windows 7 ultimate 32bits).
when trying to boot Virtual machine of VMWare, the following Error appeared...

(Client MAC ADDR:00 0c 29 5d 0b fd GUID: 564ddc38-cef7c-3a0c-28bbe5d0bfd
Client IP: 192.168.1.20 MASK: 255.255.255.0 DHCP IP: 192.168.1.11
Downloaded WDSNBP...
Architecture: x64
Contacting server: 192.168.1.11
Press F12 For network service boot
PXE-mof: Exiting intel PXE ROM.
Operting system not found
_ )





The DHCP server and WDS are installed on same machine. (active directory and DNS as well)
I tried many options as
(1) check on box in wds properties in DHCP tab >>> Dont listen on Port 67.
check on box in WDS Properties in DHCP Tab >>> Configure DHCP Option 60 to PXEClient.
(i tried checked first box then unchecked both boxes,2nd box then checked both boxes)
(2) in DHCP Server Option properties where i checked option >>> (060 PXEClient),( 067 Boot Server Host Name) where i entered the String Boot\x86\wdsnbp.com, (067 BootFile name )where string was entered PXECleint.
(3) i restared both DHCP server and WDS serveral times...
but useless
please needed help for resolving the issue...

the issue was not too big to handle but the solution was not easy as well.
in my case, i was searching on internet to find the solution but useless.

myself trying on different options to resolve it. At last, the solution was as below
( this issue arises mostly in laptop if Vmware or visualization s/w installed where F12 keys not works or doing its job as else if press, during WDS has being to be downloaded)

Truedq,

Thanks so much for sharing the solution with the rest of the community!!

Much appreciated!

Chris.