matlab(.m)生成dll出错 急!!

[jiandanai214]

MatlabBuilder错误信息如下:
Building COM object...
mcc -M -silentsetup -d 'D:/MATLAB7/work/comtest/src' -B 'ccom:comtest,sgltest,1.0' -i 'D:/yyy/im_test.m' 'D:/yyy/Split2RGB.m'
Warning: MATLAB Toolbox Path Cache is out of date and is not being used.
Type 'help toolbox_path_cache' for more info.

To get started, select <a href="matlab: doc">MATLAB Help</a> or <a href="matlab: demo matlab">Demos</a> from the Help menu.

The -i switch is no longer supported; the include exported interfaces behavior
is applied to every compilation.

Warning: (PM): Duplicate directory name: D:/yyy.
Warning: No matching builtin function available for D:/MATLAB7/toolbox/simulink/simulink/set_param.bi
> In <a href="error:D:/MATLAB7/toolbox/compiler/cmptool.m,1032,1">cmptool>build at 1032</a>
Could not find the compiler "cl" on the DOS path.
Use mbuild -setup to configure your environment properly.


D:/MATLAB7/BIN/WIN32/MEX.PL: Error: Unable to locate compiler.

??? Error using ==> mbuild
Unable to complete successfully


提示:
系统环境是 xp matlab是matlab7