Problem connecting from ASP to MDB with MyODBC links

Hi all:

I have spent lot of time with this problem, and I have Googled, but I 
haven't found real solution. You are the last hopeness.

I am editing a program with ASP that connect with an MDB database: 
Example (aaa.mdb). This database has some tables linked by MyODBC: 
Example DSN=ggg. ggg connect fine to MySQL. Notes and tries:

   * I need mix tables from Access and MySQL. The best way is to link
     by MyODBC in Access file, because the program has been developed,
     and only change the tables.
   * If I open aaa.mdb by Access, the linked tables open fine.
   * If I open by ASP Access format tables from 'aaa.mdb' all goes fine.
   * If I open by ASP MySQL tables by DSN 'ggg' all goes fine.
   *

   * BUT if I try open a MySQL table connecting by OLEDB or DSN to
     Access file 'aaa.mdb', then IIS report an error explaining that
     can't connect to 'ggg'.

I have tried a lot with IIS changing the security access (don't worry, 
is an VMware machine), but nothing has improved.

I need help with this. Perhaps IIS is not able to manage 'transitive' 
DSN's........?

Thanks in advance,

Josemi