Loss of precision using OpenQuery

Hello,

I have created a function which returns records from a linked server using OPENQUERY (text file delimited with ';') into a TABLE variable.

CREATE FUNCTION [dbo].[fct_PremierTable_IMO]()
      RETURNS TABLE
AS
RETURN
(
      SELECT ZPRXSO, ZPRXVT, ZTVARV
      FROM OPENQUERY (IMO, 'SELECT * FROM IMMOS.txt')
)

The target Table variable is as follows:
DECLARE @tTable TABLE
(
                IDENTITE INT IDENTITY (1, 1) PRIMARY KEY NOT NULL,
          ZPRXSO DECIMAL(18,2),       ZPRXVT DECIMAL(18,2),       ZTVARV DECIMAL(18,2)
)

The problem is that the decimal part of the values are lost. For example, 2356 is obtained instead of 2356.58.
I have tried to use VARCHAR instead of DECIMAL without any success.

Please help!

Rishi