Charlton have completed the signing Senegal defender Souleymane Diawara, ensuring some positive news on a day which started with confirmation Costa Rica winger Christian Bolanos had been denied a work permit by the the Home Office.
The centre-half, 27, has agreed a four-year contract with the Barclays Premiership side in £3.7million deal from French club Sochaux.
Dowie was in need of some cover at the back following injuries to Gonzalo Sorondo and Jonathan Fortune as well as the three-match suspension of Hermann Hreidarsson following his dismissal for an elbow on Bolton striker Kevin Davies at the weekend.
'Souleymane is a player I've long identified as a top defender,' declared the Charlton manager.
'He has got great pace, big stature, good ability on the ball - and he is a very powerful defender who will be well suited to the Premier League.'
Diawara was born in Gabou, but holds a French passport, and so will not require international clearance.
The 27-year-old, who started his career at Le Havre, joins compatriot Amady Faye at The Valley, after the defensive midfielder joined from Newcastle during the summer.
Dowie, however, was unable to secure a place in his squad for Bolanos.
The Addicks had agreed a one-year loan deal with South American club Deportivo Saprissa for the 22-year-old earlier this month, subject to a work permit.
Despite Bolanos having represented his country 18 times, twice in the World Cup finals, as a substitute against hosts Germany and then starting versus Poland, the player did not meet the required 75% quota of `A' appearances over the past two years set down by the Government for non-European nationals.
Dowie had been excited by the prospect of adding the attack-minded wideman - who had a trail at Liverpool after impressing against the Reds in the 2005 Club World Championship - to his squad after he linked up with Charlton during pre-season.
'We felt we had a very strong case,' said Dowie.
'Christian is an emerging talent and has become a fixture in the Costa Rica side despite his age, so it is very disappointing, not just for us but for the lad as well.'
It now remains to be seen whether Dowie will continue his shake-up of the squad he inherited from Alan Curbishley ahead of tomorrow's transfer deadline.
Uruguayan midfielder Omar Pouso is understood to have travelled to south-east London to discuss a loan move from his current South American club Penarol.
However, the experience over Bolanos may now lead Charlton to look elsewhere.
Meanwhile, Jason Euell - the club's record £4.75million signing in July 2001 - is expected to be allowed to leave, with Middlesbrough the most probable destination.