Problem with refresh form the subreport to the main form

[Akinia]

Hi every body

I've got a little problem with my form ("frm_Company").
It is divided in two parts:
- first one is filled with some text fields over the company.
- second one is filled with a tab control and give informations about
contact persons.
On this tab control there is also a form ("frm_ContactPerson") which
contains some text fields linked to a subform.
The subform displays in a datasheet few informations about the contact
person, like his surname, firtsname, phone number, email address.
More details can be seen from the text fields.
The purpose is when I go to the next record in the datasheet, I have
to see the same information in the text fields with some more.
When I test only the form the code works fine, but when I run from
"frm_Company" I get an error message like this one:
" Run time error '2489'
The object "frm_ContactPerson" isn't open"

Here is the code in the subform:
Private sub Form_click()

Dim int_NumContact as Integer

int_NumContact = CurrentRecord
DoCmd.GoToRecord acDataForm, "frm_ContactPerson", acGoTo,
int_NumContact

End Sub

Any suggestion will be appreciated.

Thanks in advance