ASA 5510 Disconnections in the internet

I have an ASA 5510 connected with the modem of the ISP which is bridged. To this ASA I have connected a cisco switch SF300 for the inside network with a static IP 192.168.0.205. The internet is intermittent when connected directly with the switch but when I connect a router with static IPs with the switch, the internet works well. The following is the running configuration of the Cisco ASA 5510.


Result of the command: "sh run"

: Saved
:
ASA Version 8.2(1)
!
hostname ciscoasa
enable password 2KFQnbNIdI.2KYOU encrypted
passwd 2KFQnbNIdI.2KYOU encrypted
names
!
interface Ethernet0/0
 speed 100
 nameif outside
 security-level 0
 ip address 213.165.xx.xx 255.255.255.224
!
interface Ethernet0/1
 speed 100
 nameif inside
 security-level 100
 ip address 192.168.0.205 255.255.0.0
!
interface Ethernet0/2
 shutdown
 no nameif
 no security-level
 no ip address
!
interface Ethernet0/3
 shutdown
 no nameif
 no security-level
 no ip address
!
interface Management0/0
 nameif management
 security-level 100
 ip address 192.168.1.1 255.255.255.0
 management-only
!
ftp mode passive
dns domain-lookup outside
dns server-group defaultDNS
 name-server 212.xx.128.xx
 name-server 212.xx.128.xx
access-list allow_inside_in extended permit tcp 192.168.0.0 255.255.0.0 any eq www
access-list allow_inside_in extended permit tcp 192.168.0.0 255.255.0.0 any eq https
access-list allow_inside_in extended permit udp 192.168.0.0 255.255.0.0 any eq domain
access-list allow_inside_in extended permit tcp 192.168.0.0 255.255.0.0 any eq 3389
pager lines 24
logging asdm informational
mtu management 1500
mtu outside 1500
mtu inside 1500
no failover
icmp unreachable rate-limit 1 burst-size 1
icmp permit any outside
no asdm history enable
arp timeout 14400
global (outside) 1 interface
nat (inside) 1 0.0.0.0 0.0.0.0
access-group allow_inside_in in interface inside
route outside 0.0.0.0 0.0.0.0 213.165.xx.65 1
timeout xlate 3:00:00
timeout conn 1:00:00 half-closed 0:10:00 udp 0:02:00 icmp 0:00:02
timeout sunrpc 0:10:00 h323 0:05:00 h225 1:00:00 mgcp 0:05:00 mgcp-pat 0:05:00
timeout sip 0:30:00 sip_media 0:02:00 sip-invite 0:03:00 sip-disconnect 0:02:00
timeout sip-provisional-media 0:02:00 uauth 0:05:00 absolute
timeout tcp-proxy-reassembly 0:01:00
dynamic-access-policy-record DfltAccessPolicy
http server enable
http 192.168.1.0 255.255.255.0 management
no snmp-server location
no snmp-server contact
snmp-server enable traps snmp authentication linkup linkdown coldstart
crypto ipsec security-association lifetime seconds 28800
crypto ipsec security-association lifetime kilobytes 4608000
telnet timeout 5
ssh timeout 5
console timeout 0
dhcpd dns 212.xx.128.xx 212.xx.128.xx
!
dhcpd address 192.168.1.2-192.168.1.254 management
dhcpd enable management
!
dhcpd address 192.168.0.10-192.168.0.200 inside
dhcpd enable inside
!
threat-detection basic-threat
threat-detection statistics access-list
no threat-detection statistics tcp-intercept
webvpn
!
class-map icmp-class
 match default-inspection-traffic
class-map inspection_default
 match default-inspection-traffic
!
!
policy-map type inspect dns preset_dns_map
 parameters
  message-length maximum 512
policy-map icmp_policy
 class icmp-class
  inspect icmp
policy-map global_policy
 class inspection_default
  inspect dns preset_dns_map
  inspect ftp
  inspect h323 h225
  inspect h323 ras
  inspect rsh
  inspect rtsp
  inspect esmtp
  inspect sqlnet
  inspect skinny  
  inspect sunrpc
  inspect xdmcp
  inspect sip  
  inspect netbios
  inspect tftp
!
service-policy global_policy global
service-policy icmp_policy interface outside
prompt hostname context
Cryptochecksum:edd93d2a41a483abe51da0d38fc11d48
: end