messages with red status in SXI_MONITOR

Hi,

we do have a bunch of XML messages in SXI_MONITOR with XI 3.0 SP12

hanging in the IS with the status:

System Error - Restart Not Possible

Can anyone tell me what we can do with this messages? I cannot restart them I also cant

delete them. How can I get rid of these messages?!

Thank for any hints!

regards

Nesimi