reciever file adapter problem

hi Gurus

We have 5 msgs stuck in 'delivering' status . I have checked http://<server>:<port>/MessagingSystem/monitor/systemStatus.jsp link and found that these 5 are holding up the queue. Below is the statistics.

File_http://sap.com/xi/XI/SystemRecv true 0 5 (5) 5

I went and saw in Received Messages-> Asynchronus and found these 5 msgs in 'delivering' status but there is no option to delete that or make it as failed.

Can someone pls hlep me how to clean up this queue so that the msgs wont come and lock here.

thank you