Ping two computers behind cascaded routers, each router has its own network

Question

Basic schema here:

Internet
    |  
    |  
x.x.x.x (WAN)
ADSL Main Router 1
255.255.255.0  
192.168.1.1 (LAN)(DHCP)
    |  
    +-----------------------------------------+
    |                                         |
    |                                         |
192.168.1.33 (WAN)                     192.168.1.234
Ethernet Router 2                    **PC 1** (Windows)
255.255.255.0                        
192.168.0.1 (LAN)(DHCP)
    |
  wi+fi
    |                             
192.168.0.103              
**PC 2** (Ubuntu)                    

The main problem is: How do I ping from PC 2 to PC 1? (Solved)

New problem: How do I ping from PC 1 to PC 2?

Some affirmations:

• Router 2 brand is TP-LINK
• Router 2 acts as A Cascaded Router and I followed this guide http://www.linksys.com/us/support-article?articleNum=132275#b to achieve so
• Router 2 network is different than Router 1's
• PC 2 is connected to its network through Wi-Fi, any other is wired-connected
• I would want to leave the subnetworks and cascading as is because Not To LAN-to-LAN
• The secondary objective of this is that I want to RDP PC 1 (Remote Desktop)
• Each local IP is provided through DHCP (Router 1: 192.168.1.33 to 192.168.1.64 -> this is correct ; Router 2: 192.168.0.100 to 192.168.0.199)
• From PC 2: I can ping Router 1 LAN (192.168.1.1)
• From PC 2: I can ping Router 2 WAN (192.168.1.33)

Output from PC 2 terminal:

iqbal@omen:~$ ping 192.168.1.234
PING 192.168.1.234 (192.168.1.234) 56(84) bytes of data.
From 192.168.1.33 icmp_seq=1 Destination Host Unreachable
From 192.168.1.33 icmp_seq=2 Destination Host Unreachable

iqbal@omen:~$ traceroute 192.168.1.234
traceroute to 192.168.1.234 (192.168.1.234), 30 hops max, 60 byte packets
 1  gateway (192.168.0.1)  4.525 ms  6.847 ms  7.719 ms
 2  192.168.1.33 (192.168.1.33)  2991.898 ms !H  2992.679 ms !H  2993.563 ms !H

Answer 1

For those who have similar network schema and issue:

• As pointed in the comments: It should work. The mistake here was some previous 'misconfigurations' since an IT guy from my Internet provider came to check some telephone issues and other things I have messed around. But the thing is It should work.

• No firewall should interfere in this topic

• PC 2 can connect to PC 1 but, at least in my case, not vice versa