You're trying to run a Windows program on Linux. You need to use a Linux program, not a Windows program.
Happily, there are heaps of sound recording programs available on Ubuntu; a quick search of the Ubuntu Software Center (the orange "bag" icon on the left-hand-side bar) will reveal a few.
On Ubuntu, there are almost no "trial versions"; most programs are free full versions. You might like this.
I am not able to instal the Above software downloaded from Cnet only and getting error msg as follows
End-of-central-directory signature not found. Either this file is not
a zipfile, or it constitutes one disk of a multi-part archive. In the
latter case the central directory and zip file comment will be found on
the last disk(s) of this archive.
zipinfo: cannot find zipfile directory in one of /tmp/cbsidlm-tr1_5-Absolute_Sound_Recorder-10361597.exe or
In Ubuntu 10.10 software system
How to proceed? pl help