RDP and Ping statements over VPN

mathelize

CCIEs, where art thou? I'm trying to configure my pix 501 to allow RDP over vpn into my home network. External clients can connect to vpn from windows machine but can't ping or RDP any internal hosts. I have Multiple windows server 2008, windows 7 and XP machines sitting inside.
This is my config
PIX Version 6.3(5)
interface ethernet0 auto
interface ethernet1 100full
nameif ethernet0 outside security0
nameif ethernet1 inside security100
enable password password encrypted
passwd password encrypted
hostname Firewall
domain-name mathelize.com
fixup protocol dns maximum-length 512
fixup protocol ftp 21
fixup protocol h323 h225 1720
fixup protocol h323 ras 1718-1719
fixup protocol http 80
fixup protocol rsh 514
fixup protocol rtsp 554
fixup protocol sip 5060
fixup protocol sip udp 5060
fixup protocol skinny 2000
fixup protocol smtp 25
fixup protocol sqlnet 1521
fixup protocol tftp 69
names
access-list allow_ping permit icmp any any echo-reply
access-list allow_ping permit icmp any any source-quench
access-list allow_ping permit icmp any any unreachable
access-list allow_ping permit icmp any any time-exceeded
pager lines 24
mtu outside 1500
mtu inside 1500
ip address outside dhcp setroute
ip address inside xxxxxxxxxxxx 255.255.255.0
ip audit info action alarm
ip audit attack action alarm
ip local pool mypool xxxxxxxxxx-xxxxxxxxxxxx
pdm location xxxxxxxxxxxx-255.255.255.255 inside
pdm history enable
arp timeout 14400
global (outside) 1 interface
nat (inside) 1 xxxxxxxxxxxx-255.255.255.0 0 0
access-group allow_ping in interface outside
timeout xlate 3:00:00
timeout conn 1:00:00 half-closed 0:10:00 udp 0:02:00 rpc 0:10:00 h225 1:00:00
timeout h323 0:05:00 mgcp 0:05:00 sip 0:30:00 sip_media 0:02:00
timeout sip-disconnect 0:02:00 sip-invite 0:03:00
timeout uauth 0:05:00 absolute

aaa-server TACACS+ max-failed-attempts 3
aaa-server TACACS+ deadtime 10
aaa-server RADIUS protocol radius
aaa-server RADIUS max-failed-attempts 3
aaa-server RADIUS deadtime 10
aaa-server LOCAL protocol local
http server enable
http xxxxxxxxxxxx 255.255.255.255 inside
no snmp-server location
no snmp-server contact
snmp-server community public
no snmp-server enable traps
floodguard enable
sysopt connection permit-ipsec
sysopt connection permit-pptp
telnet timeout 5
ssh timeout 5
console timeout 0
vpdn group myvpn accept dialin pptp
vpdn group myvpn ppp authentication pap
vpdn group myvpn ppp authentication chap
vpdn group myvpn ppp authentication mschap
vpdn group myvpn client configuration address local mypool
telnet timeout 5
ssh timeout 5
console timeout 0
vpdn group myvpn accept dialin pptp
vpdn group myvpn ppp authentication pap
vpdn group myvpn ppp authentication chap
vpdn group myvpn ppp authentication mschap
vpdn group myvpn client configuration address local mypool
vpdn group myvpn pptp echo 60
vpdn group myvpn client authentication local
vpdn username user password ********

vpdn enable outside
vpdn enable inside
dhcpd address xxxxxxxxxxxx -xxxxxxxxxxxx inside
dhcpd dns xxxxxxxxxxxx xxxxxxxxxxxx
dhcpd lease 3600
dhcpd ping_timeout 750
dhcpd enable inside
terminal width 80

I think I only need the statements that'll allow RDP and ICMP from external host. Again my internal machines can't ping the pix outside interface despite the fact they can ping outside domain names.

Any help will be much appreciated.