export/import issues

Hi , I seem to be having import issues but I am not really sure whether I have a problem. I have received an export dump file and log with the following info: "Export done in US7ASCII character set and WE8MSWIN1252 NCHAR character set, server uses WE8MSWIN1252 character set (possible charset conversion)"

When I do the import on my server, I get the following msg:
"import done in WE8MSWIN1252 character set and WE8MSWIN1252 NCHAR character export client uses US7ASCII character set (possible charset conversion)" .

Why am I getting a "possible charset conversion" on my import?

If I querry both servers(export and import servers), the same character sets are used.

PARAMETER VALUE
------------------------------ -------------
NLS_CHARACTERSET WE8MSWIN1252
NLS_NCHAR_CHARACTERSET WE8MSWIN1252

The entire schema is imported sucessfully with the exception on a create index problem. Is this caused by the possible charset conversion? Do I need to change the NLS values to avoid a char conversion? Maybe I do not not have an issue here? Please advise and thank you.

I think US7ASCII character set is a subset of your importing character set, so you should be fine!