%SPANTREE_VLAN_SW-2-MAX_INSTANCE: Platform limit of 64 STP instances

One of our user not able to connect to network and when I see the log the following message displayed. As far as I know that we can run maximum of 64 spanning tree instances. Hence do you any solution to avoid this problem. Please advice?.
Device:-
2950G Switch
Please provide good solution and documentation where I can find more information on the same.
%SPANTREE_VLAN_SW-2-MAX_INSTANCE: Platform limit of 64 STP instances exceeded. No instance created for VLAN918 (port Fa0/12).

The following information have been requested to you.
Also, you know Cisco TAC Engineer recomended that if upgrade the switch software then we will able to have 250 STP instance and provded me the following links. Please need your valuable inputs.
Enhanced software image (EI) support 250 VLANs.
http://www.cisco.com/univercd/cc/td/doc/product/lan/cat2950/2950_wc/scg/scg_vlan.htm#xtocid224831
stdsa#show vtp status
VTP Version : 2
Configuration Revision : 7
Maximum VLANs supported locally : 250
Number of existing VLANs : 106
VTP Operating Mode : Server
VTP Domain Name :
VTP Pruning Mode : Disabled
VTP V2 Mode : Disabled
VTP Traps Generation : Disabled
MD5 digest : 0xEC 0xFB 0x9D 0x49 0x84 0x8D 0x3B 0x8A
Configuration last modified by 172.27.91.3 at 10-28-93 04:28:41
Local updater ID is 172.27.91.3 on interface Vl1 (lowest numbered VLAN interface found)
stdsa#show vlan
VLAN Name Status Ports
1 default active Fa0/3, Fa0/4, Fa0/5, Fa0/6, Fa0/7, Fa0/8, Fa0/9
Fa0/10, Fa0/11, Fa0/16, Fa0/17, Fa0/18, Fa0/19
Fa0/20, Fa0/21, Fa0/22, Fa0/23, Fa0/24
916 VLAN0916 active
917 VLAN0917 active
918 VLAN0918 active Fa0/12
919 VLAN0919 active Fa0/13
920 VLAN0920 active Fa0/14
921 VLAN0921 active Fa0/15
922 VLAN0922 active
923 VLAN0923 active
924 VLAN0924 active
925 VLAN0925 active
926 VLAN0926 active
927 VLAN0927 active
928 VLAN0928 active
929 VLAN0929 active
930 VLAN0930 active
931 VLAN0931 active
stdsa#show interfaces trunk
Port Mode Encapsulation Status Native vlan
Fa0/1 on 802.1q trunking 1
Fa0/2 on 802.1q trunking 1
Gi0/1 on 802.1q trunking 1
Gi0/2 desirable 802.1q trunking 1
Port Vlans allowed on trunk
Fa0/1 1-4094
Fa0/2 1-4094
Gi0/1 1-4094
Gi0/2 1-4094
Port Vlans allowed and active in management domain
Fa0/1 1,100,200,500-501,505,801-846,901-950
Fa0/2 1,100,200,500-501,505,801-846,901-950
Gi0/1 1,100,200,500-501,505,801-846,901-950
Gi0/2 1,100,200,500-501,505,801-846,901-950
Port Vlans in spanning tree forwarding state and not pruned
Fa0/1 1,100,200,500-501,505,801-846,901-950
Fa0/2 1,100,200,500-501,505,801-846,901-950
Gi0/1 1,100,200,500-501,505,801-846,901-950
Gi0/2 1,100,200,500-501,505,801-846,901-950

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