Problem with HTML DOM

[nasreen]

Hi

My company is dealing with a third party company, who offer online Money transfer service, for a long time and I developed a software to grab the data from the website of this third party company to our server using HTML DOM.
Now the third party company is going to change their web site in which I lost most of my control in their site. The old site was built up with each seperate page for every link while this new site is only single file and calling other link using javascript in the same file.
Here my issue is I can't Navigate to the desired page automatically.
Here I put the demo version of that site

https://www.ezremitlive.net/ezr2/login.aspx

Login details:
CECRAYN001
SUPV01
password1
password2

Now what I want with my program is to go directly to the following link after it is loged automatically.
javascript:__doPostBack('Menu1$lnkBtnMenu_P3_C1','')
I wrote like this :

WB.Navigate2 "javascript:__doPostBack('Menu1$lnkBtnMenu_P3_C1','')"

But this is not working properly
If I go first to : "javascript:__doPostBack('Menu1$lnkBtnMenu_P3','')" then the above code is OK.
So how can I go automatically to :
"javascript:__doPostBack('Menu1$lnkBtnMenu_P3_C1','')"
Or to any other child link without we go to the parent link ?

And since this site with a single page EzRemitMain.aspx we can't trace the trigger of browser download complete, navigate complete etc events. These events are not fired

With regards,
Nasreen