NSD is running error message pls help

Everytime user tries to respond to an email (which is specific mailbox)that is in there an error message of '‘NDS there has been an illegal transmission.’ The user is then kicked out of Lotus notes all together. When trying to send emails out and copying spreadsheets from excel, it copies the excel as a picture and the receiver of the email can not view the spreadsheet.the message appears like that:

NSD IS RUNNING

saving to file:c:\notes\ibm_technical-support\nsd_all-…LOG

please make note of this file and its location as you may be asked to to provide this file as part of the problem determination effort

Pls help and advice

thanks in advance

Subject: NSD is running error message pls help

Hi,

Post the fatal thread section if the nsd files

JYR