Prob with cd j2sdk1.4.2

I have installed j2sdk1.4.2 on my system. the directory is created in C: as j2sdk1.4.2, all other directories such as bin etc are also there within it, but when i run this comand on my command prompt-

c:\> cd j2sdk1.4.2

It gives the foll error-

Invalid Directory

What cud be the prob?

Thanks in advance

[343 byte] By [tryj2eea] at [2007-10-1 22:22:05]