Could not run a ksh script

[gcwen@a5.shes.net]

Hi,
I have a ksh script /usr/interbase/install
-r-xr-xr-x    1 root     bin          7233 Aug 14  1998 /usr/interbase/install
But when I try to run it in potato by
deb-jp:/usr/interbase# ./install
the error message comes out as follows
bash: ./install: No such file or directory
Even when I run it in ksh shell the same message appears
ksh: ./install: No such file or directory

What is wrong? This is my first time to run a ksh script. Thanks.

Wen

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