Unable to use OPL SMB

Hello.

I've tried really hard but still can't get my PS2 to play games via SMB. I can't seem to find the cause, and would like to ask for help.
Here is the detailed info about my setup :

- PC running Windows 7 Home Premium.
- PS2 is a SCPH-70004 v12 model running FMCB 1.8 and OPL 0.8.
- PS2 and PC are connected directly via crossover cable.

PS2 network config :

PS2

IP 192.168.1.10
Mask 255.255.255.0
Gateway 192.168.1.5

PC

IP 192.168.1.5
Port 445
Share ps2smb
User GUEST
Password <blank>

PC network config for the Ethernet card :

IP adress 192.168.1.5
Subnet mask 255.255.255.0
Gateway and DNS blank

My shared folder is E:\PS2SMB\ (I made a NTFS partition on my second HDD just for those, but I'm sharing the folder, not the partition). I did create the CD and DVD folders, and placed my ISOs (properly renamed) on the proper folders.
The PC can properly ping the PS2, and other PCs can access the PS2SMB without any username (although through the router), but my PS2 cannot see my games.
Does anyone know what I did wrong?
Thanks in advance.


EDIT : Finally fixed my problem! I've been Googling the issue for a while, but I finally ended up on something interesting, a person having had a similar problem and advised using a packet sniffer to track down the issue.
Turns out there was two issues. The first being extremely silly (I'd typoed the share name on OPL, not sure how I did it but I typed " PS2SMB", with the space, so it was looking for a share that didn't exist.
However that wasn't enough. After I fixed this, OPL was able to see the PS2SMB share, but got access denied to the subfolders (CD/DVD), even though read/write permissions were set for Everyone in the Share tab.
What I did to fix this was simply go to the Security tab and also set read/write permissions for Everyone there. As I clicked OK, boom, the games appeared on OPL. :)
Thanks for trying to help, glad I figured this out finally xD

EDIT 2 : Okay, I seem to have encountered another problem. I tested two games so far and I'm definitely getting slower speeds than DVD. The games are Rayman 2 Revolution and Tales of the Abyss. I'm even getting stuttering FMV on the latter, which as far as I know, isn't supposed to happen.
I can't seem to find anything about this on the net. I'm not even sure if there indeed is a problem with my setup (I've tried two different Ethernet cables, cat5 and both give the same result) or if the problem is with the games I've tried. None of the modes helped for Tales of the Abyss and I haven't tried enabling modes on Rayman yet. I've also updated my Ethernet card's driver to the latest version on the manufacturer site. Any ideas please?

You might want to check your firewall settings windows 7 blocks SMB 445 by default

I can't find an option in Windows Firewall to enable/disable ports. Not sure why I still use that anyway, but I tried even disabling it completely and it refuses to work. So I don't think that's the cause of the problem.

EDIT : Alright, I got rid of windows firewall and installed Comodo firewall instead. I made sure it's not blocking the port 445, and it definitely isnt (I can see the PS2's IP in the list of active connections). I also tried to plug the PS2 to the router but it still won't detect my games. I'm clueless ._.

EDIT 2 : If that helps narrowing down the issue, I just tried to set up a FTP connection between PS2 and PC, and it works. So it seems something is blocking SMB and only that. I assume it's on the computer end, but I don't know what it is, I'll keep looking, if anyone has an idea please let me know. :)

Well, I'm running into more issues here, regarding speeds. Please check my last edit on the first post.