basic problem of config qmake

[Shuchi Agrawal]

i have installed evaluation version of qt 4.2.2(i think its the commercial version) and i have installed nmake 1.5 for windows..
now i made a folder n kept the basic "hello world" program's cpp file in the folder.
now on command prompt when getting into the folder, i m given yhe follwing commands then i m getting the following error w/c i m unable to fix.. can any1 plz help me..
i think the problem is in the "makefile" or "qmakespec"

C:\try1>qmake -project

C:\try1>qmake

C:\try1>nmake

Microsoft (R) Program Maintenance Utility Version 1.50
Copyright (c) Microsoft Corp 1988-94. All rights reserved.

NMAKE -f Makefile.Release

Microsoft (R) Program Maintenance Utility Version 1.50
Copyright (c) Microsoft Corp 1988-94. All rights reserved.

Makefile.Release(58) : fatal error U1088: invalid separator '::' on inference ru
le
Stop.
NMAKE : fatal error U1077: 'C:\WINDOWS\system32\cmd.exe' : return code '0x2'
Stop.

when i m making all the "::" to ":" in the makefile.debug and using the .pro file as given below then i m able to execute..
but if the same changes are done in makefile.release and .pro file is made by qmake -project cmd then again the same error..

earlier i was able to execute.. but when i installed on a new system ,fm then i m not able..
can any1 help to configure me the qmake makefile option...

my .pro file is

TEMPLATE = app
SOURCES += t1.cpp
CONFIG += qt debug windows