求助：inputdlg函数的使用问题

[temp]

我用MATLAB7.0自带的inputdlg函数，总是报错：
prompt={'Enter the matrix size for x^2:','Enter the colormap name:'};
name='Input for Peaks function';
numlines=1;
defaultanswer={'20','hsv'};

answer=inputdlg(prompt,name,numlines,defaultanswer);
??? Error using ==> isvarname
Attempt to execute SCRIPT namelengthmax as a function.

Error in ==> guihandles>createHandles at 96
if ~isempty(tag) & isvarname(tag) % can it be used as a fieldname?

Error in ==> guihandles at 75
handles = createHandles(fig);

Error in ==> inputdlg at 303
handles = guihandles(InputFig);

[xiezhh]

我在2008a里测试正常，没有错误。