The network is displayed in the diagram below：
You use the following information for switch SWA： 
Port Mode Encapsulation Status Native VLAN
fa0/1 desirable n-802.1q trunking 5
Port VLANs is allowed on trunk
fa0/ 1 1-100， 102-1005 
Port VLANs is owned and active in management domain
fa0/1 1-6. 8-100， 102-115， 197-999， 1002-1005 
Port VLANs in spanning tree forwarding state and not pruned
fa0/1 1-6， 8-100， 102-105， 108-999， 1002-1005 
SW users in VLAN 107 complain that they are unable to gain access to the resources through theSW1 router. 
What is the cause of this problem？（）