ON Premises connectivity issue from Azure (using site-to-site connectivity)

I had recently bought Azure subscription and I have created a site-to-site VPN connectivity between the azure network & the Enterprise network. The connectivity shows as successful in the virtual network dashboard & the enterprise VPN gateway logs. We have configured the Virtual address space & the onPremises local network as mentioned in the bottom

Issue

* The connectivity between azure & enterprise network shows successful in the dashboard but when we try reaching theenterprise ip 116.197.178.5 we are unable to reach the IP, tried via nmap, ssh etc.

* From the VM we are able to reach the internet but have issues with the enterprise connectivity.

* The same configuration was working in march 2014 when we had tried using theFree Azure trail account. Looks like there has been a change in Azure services sometime during march 2014

* I don't see anyways to debug this issue

* I had followed the doc in msdn site (Configure a Site-to-Site VPN in the Management Portal)

Help

* Can someone tell me whether I'm doing anything wrong

* Is there a way I can debug this issue

Device Route info

Kernel IP routing table
Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
default         10.2.1.1        0.0.0.0         UG    0      0        0 eth0
default         10.2.1.1        0.0.0.0         UG    100    0        0 eth0
10.2.1.0        *               255.255.255.0   U     0      0        0 eth0

Local network

      <LocalNetworkSite name="EnterpriseNetwork">
        <AddressSpace>
          <AddressPrefix>10.1.0.0/16</AddressPrefix>
        </AddressSpace>
        <VPNGatewayAddress>xxx.197.179.249</VPNGatewayAddress>
      </LocalNetworkSite>

Virtual network

      <VirtualNetworkSite name="Azure-network" Location="Southeast Asia">
        <AddressSpace>
          <AddressPrefix>10.2.0.0/16</AddressPrefix>
        </AddressSpace>
        <Subnets>
          <Subnet name="FrontEndSubnet">
            <AddressPrefix>10.2.0.0/24</AddressPrefix>
          </Subnet>
          <Subnet name="BackEndSubnet">
            <AddressPrefix>10.2.1.0/24</AddressPrefix>
          </Subnet>
          <Subnet name="ADDNSSubnet">
            <AddressPrefix>10.2.2.0/23</AddressPrefix>
          </Subnet>
          <Subnet name="GatewaySubnet">
            <AddressPrefix>10.2.4.0/29</AddressPrefix>
          </Subnet>
        </Subnets>
        <DnsServersRef>
          <DnsServerRef name="GoogleDNS" />
        </DnsServersRef>
        <Gateway>
          <ConnectionsToLocalNetwork>
            <LocalNetworkSiteRef name="EnterpriseNetwork">
              <Connection type="IPsec" />
            </LocalNetworkSiteRef>
          </ConnectionsToLocalNetwork>
        </Gateway>
      </VirtualNetworkSite>