check the parameters in swfvisu for ur workflow task visualisation and paste it here .....r u using java or wdabap parameters for this ...means 12300111 or TS21500003 once confirm
1. Log on to the portal with an admin user
2. System admin --> System configuration
3. Universal Worklist administration
4. Cache Administration page
5. Click clear expired items. This removes the expired items from the UWL cache.. .... try this once in last