how can i send ms xl work sheet to an email ? (i tried to send but doesn't work)?

By teejayAttach it!
You need to send the file. So if you were e-mailing, you'd hit your attach button and select the file. If you have other information in the workbook - you should copy just the part you want to send and create a new file for it.....

If your advanced Excel, you can always protect other information you don't want people seeing. A worksheet is saved as a workbook (file name). Can be one Sheet or several (if you use the tabs in the workbook)
instead of copying it and pasting in the compose mail option, send that particular file as an attachment
Compress it with Zip or Rar first... Many e-mail programs and providers won't let you send Office documents as attachments due to viruses.